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How to shift a column in Pandas DataFrame
...f[2].index+1
and finally re-combine the single columns
>>> pd.concat([df[1], df[2]], axis=1)
1 2
0 206.0 NaN
1 226.0 214.0
2 245.0 234.0
3 265.0 253.0
4 283.0 272.0
5 NaN 291.0
Perhaps not fast but simple to read. Consider setting variables for the column n...
How can I match on an attribute that contains a certain string?
...ssname listed.
The usual approach is the rather unwieldy:
//*[contains(concat(' ', @class, ' '), ' atag ')]
this works as long as classes are separated by spaces only, and not other forms of whitespace. This is almost always the case. If it might not be, you have to make it more unwieldy still...
Find and Replace text in the entire table using a MySQL query
...lace = "replace_with_this_text";
$loop = mysql_query("
SELECT
concat('UPDATE ',table_schema,'.',table_name, ' SET ',column_name, '=replace(',column_name,', ''{$find}'', ''{$replace}'');') AS s
FROM
information_schema.columns
WHERE
table_schema = '{$database}'")
o...
Can you create nested WITH clauses for Common Table Expressions?
...paths AS (
SELECT
EmployeeID,
CONVERT(VARCHAR(900), CONCAT('.', EmployeeID, '.')) AS FullPath
FROM EmployeeHierarchyWide
WHERE ManagerID IS NULL
UNION ALL
SELECT
ehw.EmployeeID,
CONVERT(VARCHAR(900), CONCAT(p.FullPath, ehw.EmployeeID, '.')...
Easy way to convert Iterable to Collection
...of appending a source Collection with another element. I can use Iterables.concat() but that gives an Iterable, not a Collection :(
– Hendy Irawan
May 10 '14 at 11:53
1
...
Adding a column to a data.frame
...02065702 2
5 0.31818 0.101238512 2
6 0.00000 0.000000000 2
7 0.50000 0.250000000 2
1 0.13636 0.018594050 3
2 0.09091 0.008264628 3
3 0.40909 0.167354628 3
4 0.04545 0.002065702 3", header=T, stringsAsFactors=F)
mytb$group<-NULL
positionsof1s<-grep(1,mytb$h_no)
m...
Adding values to a C# array
...
Using Linq's method Concat makes this simple
int[] array = new int[] { 3, 4 };
array = array.Concat(new int[] { 2 }).ToArray();
result
3,4,2
share
|
...
Show constraints on tables command
...e_name = 'my_table'
Or for better formatted output use this:
select
concat(table_name, '.', column_name) as 'foreign key',
concat(referenced_table_name, '.', referenced_column_name) as 'references'
from
information_schema.key_column_usage
where
referenced_table_name is not null
...
Install dependencies globally and locally using package.json
...
@CMCDragonkai concat them with &&, for instance npm install -g bower && npm install -g grunt-cli
– Matsemann
Dec 17 '13 at 12:07
...
How to insert a character in a string at a certain position?
...
There is no loop, it's a simple concatenation case and compiler should optimize it using a string builder, for readability I prefer to use the + operator, there is no need in this case to use StringBuilder explicitly. Using "StringBuilder" solution because ...